Suburban Nautilus IW60 Water Heater Access Door 522147 (Atwood 6 Gallon Replacement) This door is used to replace the door for an Atwood 6 gallon when swapped with the Nautilus IW60 On Demand Unit   Compatibility: Nautilus IW60 6 Gallon Water Heater Color: Polar White   Door Dime... See More